Device for preventing incrustation of steam-boilers.



.No. 755,027. PATENTED MAR. 22, 1904. J. M. MATHEWS.

DEVICE FOR PREVENTING INORUSTATION 0P STEAM BOILERS,

APPLICATION FILED MAB. 7. 1903.

1m MODEL.

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w fl 4 A I W Patented March 22, 1904.

UNTTED STATES PATENT OFFICE.

JOHN M. MATHEWS, OF ST. LOUIS, MISSOURI.

DEVICE FOR PREVENTING INQRUSTATION OF STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 755,027, dated March 22, 1904.

Application filed March '7, 1903. Serial No. 146,699. (No model!) To ztZZ whom it may concern:

Be it known that I, JOHN M. MATHEWS, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented a new and useful Device for Preventing Incrustations of Steam-Boilers, of which the following is a specification.

This invention is an improved device which can be used interchangeably either as a device for preventing incrustation in steam-boilers or a sight-feed lubricator.

With this object in view my invention consists, essentially, in connecting a sight-tube to a pipe, which-in turn is connected to either the feed-water heater or the boiler, the said pipe carrying a harp-bracket having two bores communicating with one end of the sight-tube and means for regulating the flow of oil or chemicals through one of said bores into the the same, certain parts being shown in elev'a-' tion. Fig. 3 is a horizontal section on the line 3 3 of Fig. 2. p

In carrying out my invention I employ a pipe-section A, which is threaded externally at its opposite ends, as shown at A and A respectively, and this pipe is also provided with an integral collar A adjacent to the threaded end A. A glass tube B fits into the end of the pipe A, and a stufiing-box B screws upon the threaded end A and securely packs the union of the pipe A and the tube B. A harp-bracket O, having the tubular bearing C, fits upon the pipe A and rests on the collar A, and a jam-nut D securely fastens said harpbracket upon the pipe. This harp-bracket has the pipe-sections E and F formed integral therewith, the pipe-section F having a contracted lower end F, which leads into the externally-threaded nipple G, into which the end of the sight-tube B fits, a stufling-box B being employed to make a tight joint. A vertical bore'H extends from the pipe E into the interior of the nipple G, and fitting therein is a small tube or nozzle I, which extends a considerable distance into the glass tube B. A

needle-valve K works through the stu-ifingbox L, arranged upon the top of the bracket, and is operated by means of the knob or handle K, the pointed end K being firmly seated upon the seat K produced at the upper end of the bore H.

It will thus be seen that I provide a suitable support at each end of theglass tube, thereby making it considerably stronger than the construction now in common use.

In operation the pipe is screwed either into thefeed-water heater ordirectly into theboiler, and the pipe-section E is connected with any suitable source from which either the c emical or oil is to be fed into the boiler or heater. A steam-pipe is connected to the outer end of 'the pipe-section F, andby opening the needlevalve the chemical or oil drops into the glass tube, which is filled with steam, and in that manner the oil or chemical is fed into the boiler or heater, and the amount so fed can be regulated by regulating the needle-valve. If desired, this device can be'used as a cylinder oil-sight feeder by placing a petcock in the pipe-section F, the device being reversed or turned upside down and'the petcock being opened to blow oil the device when needed. When the device is used in this manner, it will feed the oil up through the water.

It w illthus be seen that I provide-an exceedingly cheap, simple, and efficient device which can be used either for the purpose of feeding chemicals for the purpose of preventing incrustation or oil for lubricating purposes.

Having thus fully described my invention, what Iclaim as new, and desire to secure by Letters Patent, is' I 1. A device of the kind described comprising a pipe having a collar thereon, a harpbracket arranged upon the pipe and resting on the collar, pipe-sections carried by the upper portion of the harp-bracket, a vertical glass tube secured at its lower end to the first-men: I00

tioned pipe and at its opposite end to the upper portion of the harp-bracket, a vertical bore leading downward from one of the pipesections above and in alinement with the glass tube, a nozzle arranged in the lower end of the bore and extending into the tube, the other pipe-section opening downwardly into the tube to one side of the nozzle, and a needle-valve passing through the upper portion of the harp-bracket and adapted to close the upper end of the bore, means for making a tight joint around the stem of the valve, and means for fastening the bracket to the collar.

2. A device of the kind described comprising a pipe having a collar thereon, a harpbracket carried by the pipe and bearing on said collar, means for locking the bracket on the collar, pipe-sections carried by the bracket at the end opposite the collar, one of said pipesections having a contracted neck terminating in a tubular nipple portion, a glass tube se 

